ok i had a post before about this but now its different that I thought..

I can put the car in any gear, no problem..

Push the clutch in out of gear = no problems
Let the clutch out out of gear still= loud knockin/grinding sound the stops and goes like on off on off on off
Put it in gear and go forward it will, but the loud bang/thump will go under the car, (not from the rear of car though) and will do it just like if it was out of gear, on off on off on off as the car is going forward, also the faster you go the faster it makes that sound.

Any thoughts..
Im currently trying to remove the tranny but I can cause a bolt is stuck..
But what u guys think..

 

if its making the problem noise when you're not in a gear...and when you engage the clutch...it is clutch related.

check your clutch...